Mark Hamill, Carrie Fisher, and Harrison Ford Spotted in London, Just in Time for 'Star Wars' Filming

Mark Hamill, Carrie Fisher, and Harrison Ford's inevitable return to the "Star Wars" universe for "Episode VII" is one of the worst kept secrets in Hollywood, and the trio of stars haven't been doing much to quell still-officially-unconfirmed rumors of a reunion between Luke, Leia, and Han.

The latest clue that they'll all be back for the upcoming first chapter of a new "Wars" trilogy is their not-so-coincidental simultaneous appearances in London recently (the site of shooting location Pinewood Studios), evidence of which has been trickling in through social media. British actor Peter Serafinowicz (who voiced Darth Maul in "The Phantom Menance") posted a photo of him posing with Hamill on Twitter; Fisher mused on the microblogging site about her dog being spotted in London without her; and a picture of Ford chatting with Air Ambulance pilots also made the rounds online.

Serafinowicz added the cheeky caption, "I wonder why he's here," to his photo with Hamill, and it seems both he and the rest of the world already know the answer. We're just hoping that Disney will end the charade and officially announce the stars' return -- and perhaps reveal a bit of their story lines -- soon. (Disney CEO Alan Horn promised as much last week.)

"Star Wars: Episode VII," directed by J.J. Abrams, has already started some preliminary shooting in London and Abu Dhabi. It's set to hit theaters on December 18, 2015.